Reinforced concrete column crushing and dismantling device

Abstract

The invention relates to the technical field of pile breaking equipment, in particular to a reinforced concrete column breaking and dismantling device which comprises a pile breaking machine body, the pile breaking machine body is formed by annularly combining a plurality of pile breaking units through a connecting frame, each pile breaking unit is composed of a cylinder barrel, a piston rod and a pile breaking head, and the piston rod and the pile breaking head are movably connected. The pile breaking device further comprises a straightening assembly, the straightening assembly is arranged in the cylinder barrel and arranged outside the abutting section of the piston rod in a sleeving mode, a movable abutting assembly is arranged between the straightening assembly and the piston end of the piston rod, and a limiting strip for limiting the straightening assembly is arranged on the pile breaking head. The power output to the straightening assembly can be relieved, so that the straightening assembly does not bear the counter-acting force of pile breaking any more, structural fatigue damage caused by continuous stress of the straightening assembly is effectively avoided, meanwhile, the impact force of subsequent pile breaking operation directly acts on the pile breaking head, the straightening assembly is prevented from sharing power, and the pile breaking efficiency is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pile-breaking equipment, and particularly to a device for breaking and demolishing reinforced concrete columns. Background Art

[0002] Reinforced concrete columns are common vertical load-bearing members in building structures, mainly used to bear the loads transmitted from upper structures such as floors and beams and transfer them to the foundation. In construction projects such as building construction and urban renovation, the demolition of reinforced concrete columns is a common and important task. With the rapid development of the construction industry, the traditional manual demolition method has gradually been replaced by mechanical demolition equipment due to its low efficiency, high labor intensity, and high safety risks. Currently, the pile breakers widely used in the market are connected to lifting equipment through slings to achieve lifting and movement, which improves the demolition efficiency of reinforced concrete columns to a certain extent. However, there are still some problems in the actual application of existing pile breakers. For example, when using a sling to lift the pile breaker body for operation, it is difficult to ensure that the pile breaker is perpendicular to the concrete column to be broken. The verticality deviation of the pile breaker will cause the pile-breaking heads of each pile-breaking unit not to be on the same working surface, which not only reduces the breaking efficiency of the concrete column but also may affect the pile-breaking effect due to uneven force and even lead to safety accidents. After retrieval, in the patent with the application number 201810437127.8, a hydraulic pile breaker is disclosed. By setting a support boot device at the front end of the hydraulic cylinder, the support boot can be pushed out first by the piston rod of the hydraulic cylinder, so that the support boot contacts and clamps the pile body before the pile-breaking bit touches the pile body. When the extension of the piston rod of the hydraulic cylinder increases, the clamping force of the support boot on the pile body will increase, and then the included angle between the pile breaker and the pile body can be self-adjusted to keep the pile breaker perpendicular to the pile body, ensuring that the pile-breaking bit can vertically insert into the pile body during the working process of the pile breaker, greatly improving the pile-breaking quality. In actual use, the hydraulic cylinder first transmits power to the support shoe device when it operates. After the pile breaker is adjusted, it then squeezes the pile-breaking bit. When the hydraulic cylinder enters the process of squeezing the pile-breaking bit, during this process, the initially pressurized support shoe device will not relieve the force due to the work of the pile-breaking bit. Instead, it will continuously bear the power conduction from the hydraulic cylinder. From the perspective of energy utilization, since the support shoe always fits tightly against the concrete column, the support shoe and the pile-breaking bit are synchronously stressed during the pile-breaking process. This unreasonable stress causes a large amount of power to be consumed in maintaining the contact pressure between the support shoe and the concrete column, rather than all being used for the pile-breaking bit to break the pile body, resulting in a great waste of power. Secondly, the continuous and increasing extrusion force will pose a severe test to each component of the support shoe device, especially the spring parts. After the spring exceeds its elastic limit, plastic deformation (non-elastic deformation) will occur. At this time, after the external force is removed, the spring cannot return to its original length, which will cause a significant decrease or even failure of its mechanical properties (such as elastic force and stiffness), thereby affecting the service life. For this reason, we propose a device for breaking and demolishing reinforced concrete columns. Summary of the Invention

[0003] To solve the above technical problems, an embodiment of the present application provides a device for breaking and demolishing reinforced concrete columns, including a pile breaker body. The pile breaker body is formed by a plurality of pile-breaking units combined in a ring through a connecting frame. The pile-breaking unit is composed of a cylinder barrel, a piston rod, and a pile-breaking head. The piston rod and the pile-breaking head are movably connected. It further includes an alignment assembly. The alignment assembly is arranged inside the cylinder barrel and sleeved outside the pressing section of the piston rod. And an active pressing assembly is provided between the alignment assembly and the piston end of the piston rod. A limiting strip for restricting the alignment assembly is provided on the pile-breaking head.

[0004] In some embodiments, the alignment assembly includes a fixed collar and a first sleeve. Both the collar and the first sleeve are movably sleeved outside the pressing section of the piston rod. The outer end of the first sleeve is provided with a first pressing head.

[0005] In some embodiments, an accommodation groove is axially formed in the piston rod. A push rod is connected in the accommodation groove. The pile-breaking head is composed of a pointed end portion and a straight rod portion. An insertion groove for the push rod to enter is axially formed in the straight rod portion.

[0006] In some embodiments, the active pressing assembly includes a first guide rod. One end of the first guide rod is fixed to the piston end of the piston rod, and the other end penetrates through the collar. A second spring is sleeved outside the first guide rod. An active limiting member is provided inside the collar.

[0007] In some embodiments, the movable limit member includes a second sleeve, one end of the second spring is connected to the second sleeve, the first guide rod passes through the second sleeve, a lifting magnetic positioning block is provided on the outer circumference of the second sleeve, and a lifting magnetic push block is installed on the outer wall of the piston rod, and the magnetic push block and the magnetic positioning block are magnetically attracted to each other.

[0008] In some embodiments, a second groove penetrating downward is provided in the collar, and a third spring is provided between the bottom end of the magnetic positioning block and the second groove.

[0009] In some embodiments, both sides of the magnetic push block are provided with inclined surfaces, and when the magnetic push block is in a natural state, the upper end of the magnetic positioning block is embedded in the second sleeve.

[0010] In some embodiments, the push rod is provided with a lifting push bar, the straight rod portion is provided with a first guide groove, the outer wall of the piston rod is provided with a through groove, the limit bar passes through the first guide groove and the through groove, and the cylinder is provided with a limit groove for embedding the top end of the limit bar.

[0011] In some embodiments, a guide hole is formed on the outer wall of the first sleeve just for the limiting strip to pass through, and the lengths of the first guide groove and the through groove are both greater than the length of the guide hole.

[0012] In some embodiments, a first groove is formed on the outside of the push rod, and a first spring is connected between the bottom end of the push bar and the bottom end of the first groove.

[0013] The present invention has at least the following beneficial effects: 1. By setting up the alignment component, the interaction force between the first pressure head and the concrete column can be used to adjust the pile breaker body and the concrete column to a relatively vertical state, so that the pile breaking heads of each pile breaking unit can be on the same working surface, standardizing the initial state of the pile breaking operation and greatly improving the concrete column crushing efficiency.

[0014] 2. After the straightening assembly straightens the pile breaker body, the movable pressure assembly will release the pressure state during the subsequent power output, which can release the power output to the straightening assembly, so that the straightening assembly will no longer bear the pile breaking reaction force, effectively avoiding structural fatigue damage due to continuous force. At the same time, the impact force of the subsequent pile breaking operation directly acts on the pile breaking head, avoiding the straightening assembly from sharing power, and further improving the pile breaking efficiency.

[0015] 3. As an expandable component, the external pressure positive part can be flexibly installed on the pile breaker body according to different working conditions to meet complex and diverse operation requirements. During installation, the telescopic part and the retaining plate can reduce radial shaking, and the double-limit fixing mechanism composed of the threaded rod and the pressing block not only ensures the stability of the telescopic part during operation, but also enables quick disassembly by rotating the threaded rod. Compared with traditional bolt fixing, the installation efficiency is greatly improved, facilitating later maintenance and component replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the pile breaking unit in a sectional view of the cylinder barrel of the present invention; Figure 2 is a schematic overall structural diagram under the first embodiment of the present invention; Figure 3 is a schematic external structural diagram of the pile breaking unit of the present invention; Figure 4 is a schematic structural diagram of the pile breaking unit in a sectional view of the cylinder barrel and the alignment component of the present invention; Figure 5 is a schematic structural diagram of the pile breaking unit in a sectional view of the cylinder barrel, the piston rod and the alignment component of the present invention; Figure 6 is a schematic structural diagram of the pile breaking unit in a sectional view of the cylinder barrel, the piston rod, the pile breaking head and the alignment component of the present invention; Figure 7 is a schematic sectional structural diagram of the push rod of the present invention; Figure 8 For the present invention Figure 4 is an enlarged schematic view at position A in; Figure 9 is a schematic overall structural diagram under the second embodiment of the present invention; Figure 10 is a schematic structural diagram of the external pressure positive part of the present invention.

[0017] In the figure: 1 - pile breaker body; 2 - pile breaking unit; 21 - cylinder barrel; 22 - piston rod; 221 - receiving groove; 222 - push rod; 2221 - first groove; 2222 - first spring; 223 - push bar; 224 - through groove; 23 - pile breaking head; 231 - pointed end part; 232 - straight rod part; 233 - first guide groove; 3 - connecting frame; 4 - lifting ring; 5 - alignment component; 51 - collar; 52 - first sleeve; 53 - first pressing head; 6 - movable pressing component; 61 - first guide rod; 62 - second spring; 63 - movable limiting part; 631 - second sleeve; 632 - magnetic positioning block; 633 - third spring; 634 - second groove; 64 - magnetic pushing block; 7 - limiting strip; 8 - limiting groove; 9-external pressure part; 91-mounting frame; 92-enclosing plate; 93-telescopic part; 94-second pressure head; 95-limiting part; 951-threaded rod; 952-stop block; 953-pressure block; 954-second guide rod. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Example 1: Please refer to Figures 1-8 As shown, the present invention provides a technical solution: a reinforced concrete column crushing and demolition device, including a pile breaker body 1, the pile breaker body 1 is composed of a plurality of pile breaking units 2 formed by a ring-shaped combination through a connecting frame 3, the pile breaking unit 2 is composed of a cylinder 21, a piston rod 22 and a pile breaking head 23, a lifting ring 4 is fixed on the connecting frame 3, when in use, a sling (iron chain) is connected to the lifting ring 4, and the pile breaker body 1 is lifted and moved by a lifting device, the above is the prior art, and the specific structure and principle are not repeated here, the piston rod 22 and the pile breaking head 23 are movably connected, and also includes a straightening component 5, the straightening component 5 is arranged inside the cylinder 21, and is sleeved on the outside of the pressing section of the piston rod 22, and the straightening component 5 is used to break concrete when the pile breaker body 1 Before the pile breaker body 1 is lifted by the sling, the pile breaker body 1 and the broken concrete column are adjusted to a vertical state, so that the pile heads 23 of the pile breaking units 2 of the pile breaker are ensured to be on the same working surface. At the same time, the standardization of the initial state of the pile breaking operation is ensured, and the concrete column crushing efficiency is greatly improved. A movable pressing assembly 6 is provided between the straightening assembly 5 and the piston end of the piston rod 22, and a limiting strip 7 for limiting the straightening assembly 5 is provided on the broken pile head 23. It is used to limit the position of the straightening assembly 5 after the straightening assembly 5 straightens the pile breaker body 1, and realize the release of the movable pressing assembly 6, so that the impact force generated by the subsequent pile breaking operation directly acts on the broken pile head 23, effectively avoiding the structural fatigue caused by the straightening assembly 5 continuously bearing the reaction force of the pile breaking.

[0020] Among them, see Figure 1 as well as Figures 3-6As shown in the figure, the alignment component 5 includes a fixed collar 51 and a first sleeve 52. Both the collar 51 and the first sleeve 52 are movably sleeved outside the pressing section of the piston rod 22. A first pressing head 53 is installed at the outer end of the first sleeve 52. After hydraulic oil is introduced through the oil inlet of the cylinder barrel 21, the piston end of the piston rod 22 moves. Then, the movable pressing component 6 is used to push the collar 51 outward, so as to use the first sleeve 52 to push the first pressing head 53 outward. Further, the first pressing head 53 is used to press against the concrete column to be broken. By continuously applying force, the interaction force between the first pressing head 53 and the concrete column will adjust the pile breaker body 1 and the concrete column to a vertical state.

[0021] Refer to Figures 5-6 As shown in the figure, a receiving groove 221 is axially formed in the piston rod 22. A push rod 222 is connected in the receiving groove 221. The pile breaking head 23 is composed of a pointed end portion 231 and a straight rod portion 232. An embedding groove for the push rod 222 to enter is axially formed in the straight rod portion 232. During the operation of the alignment component 5, the push rod 222 in the receiving groove 221 will move towards the pile breaking head 23, and the end of the push rod 222 can enter the embedding groove axially formed in the straight rod portion 232.

[0022] Refer to Figures 5-7 As shown in the figure, a lifting push bar 223 is provided on the push rod 222. Specifically, a first groove 2221 is formed outside the push rod 222. A first spring 2222 is connected between the bottom end of the push bar 223 and the bottom end of the first groove 2221. In the natural state of the first spring 2222, the upper end surface of the push bar 223 is slightly higher than the upper end surface of the straight rod portion 232. A first guide groove 233 is formed in the straight rod portion 232, and a through groove 224 is formed in the outer wall of the piston rod 22. The limiting strip 7 passes through the first guide groove 233 and the through groove 224. A limiting groove 8 for the top end of the limiting strip 7 to be embedded is formed in the cylinder barrel 21. A guide hole just for the limiting strip 7 to pass through is formed in the outer wall of the first sleeve 52 to realize synchronous movement of the limiting strip 7. The lengths of both the first guide groove 233 and the through groove 224 are greater than the length of the guide hole. The lengths of the first guide groove 233 and the through groove 224 are set to avoid blocking of the pile breaking head 23 by the limiting strip 7 when the pile breaking head 23 moves outward.

[0023] During the process of the piston rod 22 moving to push the collar 51 outward, the push rod 222 moves synchronously with the piston rod 22. When all the push bars 223 on the push rod 222 move to the position of the first guide groove 233, at this time, the limiting strip 7 moves to be directly opposite to the limiting groove 8, and the push bar 223 loses the pressure. It can instantly move under the action of the first spring 2222, so that the top end of the limiting strip 7 moves upward into the limiting groove 8, thus locking the first sleeve 52 and the cylinder barrel 21. At the same time, the bottom end of the upward moving limiting strip 7 is just flush with the upper end surface of the straight rod portion 232, and the upper end surface of the push bar 223 is also just flush with the upper end surface of the straight rod portion 232 under pressure, so that the limiting strip 7 will not block the subsequent outward movement of the straight rod portion 232.

[0024] Refer to Figure 1 and Figure 4 As shown, the movable pressing component 6 includes a first guide rod 61. One end of the first guide rod 61 is fixed on the piston end of the piston rod 22, and the other end penetrates through the collar 51. A second spring 62 is sleeved outside the first guide rod 61. The first guide rod 61 plays a guiding role, and a movable limiting member 63 is arranged inside the collar 51.

[0025] Among them, refer to Figures 4-6 and Figure 8 As shown, the movable limiting member 63 includes a second sleeve 631. One end of the second spring 62 is connected to the second sleeve 631. The first guide rod 61 penetrates through the second sleeve 631. An ascending and descending magnetic positioning block 632 is arranged on the outer circumference of the second sleeve 631. An ascending and descending magnetic pushing block 64 is installed on the outer wall of the piston rod 22. The magnetic pushing block 64 is arranged close to the collar 51, so that the moving distance of the magnetic pushing block 64 is short, reducing the loss of force transmitted to the alignment component 5. Similarly, a groove is formed on the piston rod 22, and a spring is connected between the bottom end of the magnetic pushing block 64 and the groove. The magnetic pushing block 64 and the magnetic positioning block 632 are magnetically attracted to each other. A downwardly penetrating second groove 634 is arranged inside the collar 51. A third spring 633 is arranged between the bottom end of the magnetic positioning block 632 and the second groove 634. The elastic force value of the third spring 633 is greater than the elastic force value of the spring connected to the bottom end of the magnetic pushing block 64. Both sides of the magnetic pushing block 64 are provided with inclined surfaces. In the natural state of the magnetic pushing block 64, the upper end of the magnetic positioning block 632 is embedded in the second sleeve 631.

[0026] Through the above, the magnetic pushing block 64 moves synchronously with the piston rod 22. After the top end of the limiting strip 7 moves upward into the limiting groove 8, as the piston rod 22 continues to move outward, the inclined surface magnetic pushing block 64 on the piston rod 22 can enter and first be squeezed into the collar 51. When reaching the position of the second groove 634, the magnetic pushing block 64 can move upward under the elastic force of the third spring 633, making the magnetic pushing block 64 close to the magnetic positioning block 632 to attract the magnetic positioning block 632 to move downward, so that the top end of the magnetic positioning block 632 is disengaged from the state of restricting the second sleeve 631. At this time, the second sleeve 631 connected to the second spring 62 can pass through the collar 51, and both the first guide rod 61 and the second spring 62 can penetrate through the collar 51, so that no power is applied to the collar 51 anymore. This enables all subsequent hydraulic power to be transmitted to the pile breaking head 23, avoiding part of the power being shared by the alignment component 5, improving the pile breaking efficiency, and at the same time avoiding damage caused by excessive extrusion of the alignment component 5.

[0027] Embodiment 2: Please refer to Figures 9-10As shown, the present embodiment is different from the embodiment 1 in that the alignment component 5 is an external pressure positive component 9, which is detachably mounted on the connecting frame 3 and can be fixed by bolts. The external pressure positive component 9 is used to realize the alignment of the pile breaker body 1 from the outside before breaking the pile, and the external pressure positive component 9 includes a mounting frame 91 detachably mounted on the upper end surface of the connecting frame 3, a telescopic member 93 is provided on the supporting surface of the mounting frame 91, and the telescopic member 93 can be a hydraulic cylinder. A second pressure head 94 is installed at the output end of the telescopic member 93, and a surrounding plate 92 that can be sleeved on the outside of the telescopic member 93 is fixed on the supporting surface of the mounting frame 91 to limit the telescopic member 93, and a limit member 95 is installed at the end of the upper end of the mounting frame 91 to further ensure the stability of the telescopic member 93.

[0028] Among them, the limiting member 95 includes a threaded rod 951 that is vertically screwed through the mounting frame 91, a handwheel can be installed on the top of the threaded rod 951, a stopper 952 is installed on the bottom end of the threaded rod 951 through a bearing, and a pressure block 953 is installed on the outer ring of the bearing, and a second guide rod 954 is connected to the top of the pressure block 953, and the second guide rod 954 runs through the mounting frame 91.

[0029] As described above, the external pressure positive part 9 is an expandable component of the pile breaker, and adopts a modular design. It can be selectively installed on the pile breaker body 1 according to different working conditions to achieve flexible installation. When the external pressure positive part 9 is used, the telescopic part 93 is used to drive the second pressure head 94 to extend outward to squeeze the reinforced concrete column, and then the angle between the pile breaker and the soil column can be self-adjusted to keep the pile breaker and the soil column vertical; When installing the telescopic part 93 on the mounting frame 91, the telescopic part 93 can be passed through the enclosure 92 to reduce the radial shaking of the telescopic part 93 during the telescopic process. Then, the threaded rod 951 is rotated to move the stop block 952 and the pressure block 953 downward. The telescopic part 93 is pressed by the pressure block 953, and the outer end of the telescopic part 93 is simultaneously blocked by the stop block 952 to ensure the stability of the telescopic part 93. This double-limit fixing mechanism not only ensures the stability of the telescopic part 93 during operation, but also can achieve rapid disassembly by rotating the threaded rod 951. Compared with the traditional bolt fixing method, the installation efficiency is greatly improved, and it is convenient for later maintenance and component replacement.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A reinforced concrete column breaking and demolishing device, comprising a pile breaker body (1), wherein the pile breaker body (1) is annularly combined by a plurality of pile breaking units (2) through a connecting frame (3), and the pile breaking unit (2) is composed of a cylinder barrel (21), a piston rod (22) and a pile breaking head (23), and is characterized in that: The piston rod (22) and the pile breaking head (23) are movably connected. There is also a positioning component (5). The positioning component (5) is arranged inside the cylinder barrel (21), sleeved outside the pressing section of the piston rod (22), and there is a movable pressing component (6) between the positioning component (5) and the piston end of the piston rod (22). A limiting strip (7) for restricting the positioning component (5) is arranged on the pile breaking head (23).

2. The reinforced concrete column breaking and demolishing device according to claim 1, characterized in that: The positioning component (5) includes a fixed collar (51) and a first sleeve (52). Both the collar (51) and the first sleeve (52) are movably sleeved outside the pressing section of the piston rod (22), and a first pressing head (53) is installed at the outer end of the first sleeve (52).

3. The reinforced concrete column breaking and demolishing device according to claim 2, characterized in that: An accommodating groove (221) is axially formed in the piston rod (22). A push rod (222) is connected in the accommodating groove (221). The pile breaking head (23) consists of a pointed end portion (231) and a straight rod portion (232). An embedding groove for the push rod (222) to enter is axially formed in the straight rod portion (232).

4. The reinforced concrete column breaking and demolishing device according to claim 1, characterized in that: The movable pressing component (6) includes a first guide rod (61). One end of the first guide rod (61) is fixed on the piston end of the piston rod (22), and the other end penetrates through the collar (51). A second spring (62) is sleeved outside the first guide rod (61), and a movable limiting member (63) is arranged inside the collar (51).

5. The reinforced concrete column breaking and demolishing device according to claim 4, characterized in that: The movable limiting member (63) includes a second sleeve (631). One end of the second spring (62) is connected to the second sleeve (631). The first guide rod (61) penetrates through the second sleeve (631). An ascending and descending magnetic positioning block (632) is arranged on the outer circumference of the second sleeve (631). An ascending and descending magnetic pushing block (64) is installed on the outer wall of the piston rod (22). The magnetic pushing block (64) and the magnetic positioning block (632) are magnetically attracted to each other.

6. The reinforced concrete column breaking and demolishing device according to claim 5, characterized in that: A downwardly penetrating second groove (634) is arranged inside the collar (51). A third spring (633) is arranged between the bottom end of the magnetic positioning block (632) and the second groove (634).

7. The reinforced concrete column breaking and demolishing device according to claim 6, characterized in that: Both sides of the magnetic pushing block (64) are provided with inclined surfaces. In the natural state of the magnetic pushing block (64), the upper end of the magnetic positioning block (632) is embedded in the second sleeve (631).

8. The reinforced concrete column breaking and demolishing device according to claim 3, characterized in that: An ascending and descending push strip (223) is arranged on the push rod (222). A first guide groove (233) is formed on the straight rod portion (232). A through groove (224) is formed on the outer wall of the piston rod (22). The limiting strip (7) penetrates through the first guide groove (233) and the through groove (224). A limiting groove (8) for the top end of the limiting strip (7) to be embedded is formed inside the cylinder barrel (21).

9. The reinforced concrete column breaking and demolishing device according to claim 8, characterized in that: A guide hole just for the limiting strip (7) to penetrate is formed on the outer wall of the first sleeve (52). The lengths of both the first guide groove (233) and the through groove (224) are greater than the length of the guide hole.

10. The reinforced concrete column breaking and demolishing device according to claim 8, characterized in that: A first groove (2221) is formed outside the push rod (222). A first spring (2222) is connected between the bottom end of the push strip (223) and the bottom end of the first groove (2221).

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